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A mathematical model for evolution of flow stress during hot deformation

Serajzadeh, S ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2005.05.065
  3. Publisher: 2005
  4. Abstract:
  5. A mathematical model has been proposed to predict flow behavior of steel under hot deformation conditions with regard to the effects of dynamic recovery and dynamic recrystallization. For this purpose, Kocks-Mecking dislocation model together with a first order rate equation have been utilized. To associate temperature and strain rate variations on flow behavior of deforming metal, a thermo-viscoplastic finite element model has been coupled with the proposed model. To verify the modeling results, hot rolling experiments were performed and roll forces at various temperatures and rolling speeds were recorded. A good agreement was found between the predicted and the experimental data. © 2005 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Deformation ; Finite element method ; Hot working ; Plastic flow ; Recrystallization (metallurgy) ; Viscoplasticity ; Dynamic restoration ; Finite element models ; Hot deformation ; Kocks-Mecking dislocation model ; Mathematical models
  8. Source: Materials Letters ; Volume 59, Issue 26 , 2005 , Pages 3319-3324 ; 0167577X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0167577X05005501